JPWO2019087264A1 - Air conditioner, control method and program - Google Patents

Abstract

The air conditioner (1) includes a heat exchanger, a windward temperature sensor (6) and a windward humidity sensor (7) arranged on the windward side of the heat exchanger, and a leeward temperature arranged on the leeward side of the heat exchanger. A sensor (8), a leeward humidity sensor (9), and a controller (13) are provided. The control unit (13) detects the leeward temperature and humidity of the leeward temperature sensor (6) and the upwind humidity sensor (7). From the total enthalpy obtained using the first enthalpy when the air changes to the side temperature and humidity, and the windward temperature and humidity detected by the windward temperature sensor (6) and the windward humidity sensor (7), The air changes to the temperature and humidity set by the user at the desired time set by the user based on the total heat load obtained by using the second enthalpy when the air changes to the temperature and humidity set by the user. Control the operation mode.

Description

  The present invention relates to an air conditioner, a control method and a program.

  BACKGROUND ART Air conditioners such as room air conditioners are required to optimally control loads during operation to reduce power consumption. For example, Patent Document 1 discloses an air conditioner that calculates the amount of heat flowing in and out of the room from the temperature distribution in the room detected by a thermal image sensor, and optimizes the load control of the air conditioner. Further, Patent Document 2 discloses an air conditioner that detects indoor temperature and humidity with a sensor, estimates a load from the detected temperature and humidity, and optimizes control based on the estimated load.

JP, 2016-8796, A JP, 2009-8390, A

  Power consumption during operation of the air conditioner is related to the temperature and humidity of the air-conditioned space. However, the air conditioner disclosed in Patent Document 1 can detect the temperature of the air-conditioned space by the thermal image sensor, but cannot detect the humidity.

  Further, in order to accurately obtain the load of the air conditioner, it is necessary to accurately obtain the amount of air blown from the air outlet of the air conditioner. In order to accurately determine the amount of blown air, it is necessary to obtain the pressure loss of the air blowing path of the air blown out from the air outlet of the air conditioner. The pressure loss of the air flow passage is the sum of the pressure loss of the wind direction control plate, the pressure loss of the heat exchanger, and the other pressure loss excluding the pressure loss of the wind direction control plate and the heat exchanger. Therefore, in order to obtain the pressure loss of the air flow passage, it is necessary to obtain the angle of the wind direction control plate and the pressure loss of the heat exchanger due to the condensed water of the fins.

  However, the air conditioner disclosed in Patent Document 2 does not detect the angle of the wind direction control plate. Moreover, the pressure loss of the heat exchanger due to the condensed water of the fins is not obtained. Therefore, the air conditioner disclosed in Patent Document 2 cannot calculate the pressure loss in the air blowing passage. That is, the amount of blown air cannot be accurately calculated, and the load on the air conditioner cannot be accurately estimated.

  The present invention is for solving the above problems, and by accurately estimating the load during driving, it is possible to optimally control the driving in accordance with the user's preference while suppressing the power consumption. An object is to provide an air conditioner, a control method, and a program that can be performed.

  To achieve the above object, an air conditioner according to the present invention includes a heat exchanger, a windward temperature sensor and a windward humidity sensor arranged on the windward side of the heat exchanger, and a windward side on the heat exchanger. The air changes from the leeward temperature sensor and leeward humidity sensor, and the leeward temperature and humidity detected by the leeward temperature sensor and leeward humidity sensor to the leeward temperature and humidity detected by the leeward temperature sensor and leeward humidity sensor. When the air changes from the total enthalpy obtained using the first enthalpy at the time of the operation and the windward temperature and humidity detected by the windward temperature sensor and the windward humidity sensor to the temperature and humidity set by the user. Based on the total heat load obtained using 2 enthalpies, a control unit that controls the operation mode so that the air in the air-conditioned space changes to the temperature and humidity set by the user at the desired time set by the user. Prepare

  As described above, according to the present invention, since it is possible to accurately estimate the load during operation, it is possible to obtain an air conditioning apparatus, a control method, and a program that maximize user comfort while suppressing power consumption. You can

The figure which showed the structure of the air conditioning apparatus in Embodiment 1. Schematic diagram of the heat exchanger in the first embodiment The figure which showed the state which the fin of the heat exchanger in Embodiment 1 has dried. The figure which showed the state which the water film has adhered to the fin of the heat exchanger in Embodiment 1. The figure which showed the time change of the temperature in the room at the time of continuing operating the air conditioning apparatus in Embodiment 1 in cooling operation mode. The figure which showed the time change of the relative humidity of a room when the air conditioning apparatus in Embodiment 1 is continued operating in cooling operation mode. The figure which showed the time change of the indoor temperature at the time of switching the air conditioning apparatus in Embodiment 1 from cooling operation mode to reheat dehumidification mode. The figure which showed the time change of the relative humidity of the room at the time of switching the air conditioning apparatus in Embodiment 1 from cooling operation mode to reheat dehumidification mode. FIG. 3 is a diagram showing a control flow for automatically switching between the cooling operation mode and the reheat dehumidification mode in the first embodiment. Flowchart of the cooling operation mode switching process in the first embodiment Flowchart of total enthalpy calculation processing in the first embodiment A psychrometric chart for obtaining the enthalpy change of air that changes to the leeward temperature and humidity from the windward temperature and humidity of the heat exchanger according to the first embodiment. Flowchart of total heat load calculation processing in the first embodiment The figure which the thermal image sensor in Embodiment 1 captures the thermal image of an air-conditioned space. A psychrometric chart for obtaining the enthalpy change of air that changes from the current temperature and humidity to the temperature and humidity preferred by the user in the first embodiment. Flowchart of optimum operation mode switching time calculation processing in the first embodiment Flowchart of operation mode switching processing in the first embodiment The figure which showed the humidity generation amount from the humidity generation source in Embodiment 2.

Embodiment 1.
Hereinafter, embodiments of the air conditioner of the present invention will be described in detail with reference to the drawings.

  FIG. 1 is a diagram showing the configuration of the air conditioning apparatus 1 according to the first embodiment. The air conditioner 1 has a function of optimally controlling the operation according to the user's preference while suppressing the power consumption by accurately estimating the load during operation, and filters the air taken in from the outside. Filter 2, heat exchangers 3_1, 3_2, 3_3, a fan 4 for taking in or blowing out air, a wind direction control plate 5, an upwind temperature sensor 6 and an upwind humidity sensor 7, and a downwind temperature sensor 8 and An leeward humidity sensor 9, a fan rotation sensor 10, a thermal image sensor 11, an angle detection sensor 12, a control unit 13, a storage unit 14, and a remote controller 15 are provided.

  The heat exchangers 3_1, 3_2 and 3_3 are collectively referred to as the heat exchanger 3. As shown in FIG. 2A, the heat exchanger 3 includes a plurality of fins 20 arranged with a gap therebetween and a pipe 21 penetrating the plurality of fins 20. The refrigerant flows through the pipe 21. The air taken in from the outside of the air conditioner 1 passes through the gaps of the plurality of fins 20 from the upwind side of the heat exchanger 3 to the downwind side. At that time, the air is cooled by the refrigerant flowing through the pipe 21.

  An enlarged view of the gap portion between the plurality of fins 20 is shown in FIGS. 2B and 2C. FIG. 2B shows a state in which the gap portion of the fin 20 is dry. When the temperature of the air passing between the fins 20 becomes lower than the dew point, the water vapor in the air is condensed on the fins 20 as condensed water. Therefore, the humidity of the air passing through the heat exchanger 3 becomes low. From the air outlet of the air conditioner 1, dry air with low humidity is blown out.

  The condensed condensed water forms a water film 22 on the fin 20, as schematically shown in FIG. 2C. The change in the thickness of the water film 22 changes the ease with which the air passing through the heat exchanger 3 passes, which changes the pressure loss in the heat exchanger 3. In addition, the surface of the fin 20 is treated with a coating agent having a strong hydrophilic action so that the condensed water easily drops into water. The condensed water that has been turned into water droplets is discharged to the outside of the air conditioning apparatus 1.

  The wind direction control plate 5 is a vertical flap that controls the vertical wind direction. The wind direction control plate 5 is controlled by using a stepping motor.

  The windward temperature sensor 6 and the windward humidity sensor 7 are sensors arranged on the windward side of the heat exchanger 3_2. The windward temperature sensor 6 and the windward humidity sensor 7 detect the temperature and humidity of the air before passing through the heat exchanger 3_2. The leeward temperature sensor 8 and the leeward humidity sensor 9 are sensors arranged leeward of the heat exchanger 3_2. The leeward temperature sensor 8 and the leeward humidity sensor 9 detect the temperature and humidity of the air that has passed through the heat exchanger 3_2.

  The fan rotation sensor 10 is a sensor that reads the rotation speed of the fan 4. For example, the thermal image sensor 11, which will be described in detail later, is a sensor that captures a thermal image for determining the size of the air-conditioned space. The angle detection sensor 12 is a sensor that detects the angle of the wind direction control plate 5. As the angle detection sensor 12, for example, a rotary encoder provided in a stepping motor that controls the wind direction control plate 5 is used.

  Further, the windward temperature sensor 6, the windward humidity sensor 7, the leeward temperature sensor 8, the leeward humidity sensor 9, and the angle detection sensor 12 are connected to an electric board in the air conditioner 1 by using electric wiring. ing.

  The control unit 13 executes various programs stored in the storage unit 14 and controls the operation of the air conditioning apparatus 1. As the control unit 13, for example, an arithmetic unit such as a CPU (Central Processing Unit) or an MPU (Micro processing unit) is used. The storage unit 14 stores various programs executed by the control unit 13, detection results of each sensor, and various data necessary for controlling the air conditioning apparatus 1. For the storage unit 14, for example, a storage element such as a RAM (Random access memory) or an IC (Integrated Circuit) memory is used.

  The remote controller 15 is a controller for the user to input various setting data necessary for controlling the air conditioning apparatus 1. The user sets, for example, the temperature and humidity preferred by the user and the desired time for reaching the temperature and humidity preferred by the user from the remote controller 15 to the air conditioning apparatus 1.

  When operating the air conditioner 1 in the cooling operation, two operation modes can be used. One is the cooling operation mode, and the other is the reheat dehumidification operation mode. The air conditioner 1 can switch between the cooling operation mode and the reheat dehumidification operation mode at any time.

First, the relationship between the temperature and the humidity of the air in the air-conditioned space when the air conditioner 1 is operated only in the cooling operation mode will be described with reference to FIGS. 1, 3A, and 3B.
In the cooling operation mode, all the heat exchangers 3 shown in FIG. 1 are used as evaporators. The temperature of the evaporator is set lower than the temperature of air taken in from the outside. Therefore, the air passing through the heat exchanger 3 is cooled. When the temperature of the air becomes lower than the dew point, the water vapor in the air becomes condensed water on the fins 20 to be condensed, and the temperature and humidity of the air decrease.

  An example of the relationship between the temperature and the humidity of the air in the air-conditioned space when the air conditioner 1 is operated only in the cooling operation mode is shown in FIGS. 3A and 3B. In this example, at t0, which is the operation start time of the air conditioning apparatus 1, the air in the air-conditioned space has a temperature of 28 degrees and a relative humidity of 75%. After 1 hour from the operation start time of the air conditioner 1, the temperature becomes 20 degrees and the relative humidity becomes 55%. That is, in the cooling operation mode, both the temperature and the humidity of the air decrease with the operating time of the air conditioner 1.

  Next, regarding the relationship between the temperature and the humidity of the air in the air-conditioned space when the air conditioner 1 is switched from the cooling operation mode to the reheat dehumidification operation mode to perform the cooling operation, FIGS. It will be described with reference to FIG.

  In the reheat dehumidification mode, part of the heat exchanger 3 is used as an evaporator for cooling the air, and the remaining heat exchangers are used as condensers for warming the air. For example, the heat exchangers 3_1 and 3_2 are used as evaporators, and the heat exchanger 3_3 is used as a condenser. The condenser temperature is set higher than the evaporator temperature. Therefore, the temperature and humidity of the air that has passed through the condenser are higher than the temperature and humidity of the air that has passed through the evaporator. From the air outlet of the air conditioner 1, air obtained by mixing the air passing through the evaporator and the air passing through the condenser is blown out.

  An example of the relationship between the temperature and the humidity of the air in the air-conditioned space is shown in FIGS. 4A and 4B. 4A and 4B, the air conditioning apparatus 1 is in the cooling operation mode from time t0 to time t1 and in the reheat dehumidification operation mode from time t1 to time t2.

  At t0, which is the operation start time of the air-conditioning apparatus 1, the temperature of air is 28 degrees and the relative humidity is 75%. At time t1, the temperature becomes 23 degrees and the relative humidity is 55%. From the time t0 to the time t1, since the cooling operation mode is set, both the temperature and the humidity of the air decrease. At time t1, it is assumed that the operation method of the air conditioner 1 is switched from the cooling operation mode to the reheat dehumidification operation mode so as to dehumidify while maintaining the room temperature. In this case, the air having a temperature of 23 degrees and a relative humidity of 60% at time t1 has a temperature of 23 degrees and a relative humidity of 55% at time t2.

  As described above, in the reheat dehumidifying operation mode, it is possible to reduce only the humidity while maintaining the temperature. Therefore, in the reheat dehumidification operation mode, it is possible to prevent the temperature and the humidity from being lowered too much, as compared with the cooling operation mode. However, in the reheat dehumidification mode, since the evaporator and the condenser perform two operations, the power consumption becomes larger than that in the cooling operation mode.

  There are various preferences of the user who uses the air conditioner 1, and for example, it is desired to lower the temperature and humidity faster by using the cooling operation mode. Since the power consumption may be large, the temperature can be lowered by using the reheat dehumidification operation mode. There are many possibilities, such as wanting to suppress overshooting, and lowering temperature and humidity more quickly while suppressing power consumption.

  Therefore, the air conditioner 1 is automatically switched between the cooling operation mode and the reheat dehumidification mode at appropriate timing to be controlled, so that the power consumption can be suppressed while reflecting the user's preference. ..

  FIG. 5 shows a control flow for automatically switching between the cooling operation mode and the reheat dehumidification mode in the air conditioner 1. This control flow is a process executed by the control unit 13. This control flow is executed in the control unit 13 when the remote controller 15 inputs the user's favorite temperature and humidity, or the user's desired time until reaching the user's favorite temperature and humidity.

  In the control flow, first, the total enthalpy calculation process 31 calculates the total enthalpy amount from the start of the cooling operation of the air conditioner 1. The total enthalpy calculation processing unit 31 calculates the temperature change amount of the air from the windward to the leeward of the heat exchanger 3 from the temperatures detected by the windward temperature sensor 6 and the leeward temperature sensor 8. Next, the total enthalpy calculation processing unit 31 calculates the amount of change in humidity of the air from the windward to the leeward of the heat exchanger 3 from the humidity detected by the windward humidity sensor 7 and the leeward humidity sensor 9. The total enthalpy calculation processing unit 31 calculates, from the calculated temperature change amount and humidity change amount of air, the angle of the wind direction control plate 5 detected by the angle detection sensor 12, and the rotation speed of the fan 4 read by the fan rotation sensor 10, The total enthalpy from the start of the cooling operation of the air conditioner 1 is calculated.

  Next, the total heat load calculation processing unit 32 calculates the volume in the air-conditioned space based on the thermal image of the air-conditioned space taken by the thermal image sensor 11. Further, the enthalpy change amount required for the current indoor temperature and humidity to reach the user's favorite temperature and humidity by the user's desired time input from the remote controller 15 is obtained. From the enthalpy change amount and the indoor volume, the heat load amount required until the current indoor temperature and humidity reach the temperature and humidity that the user prefers is calculated.

  The optimum operation mode switching time calculation processing unit 34, based on the total enthalpy amount calculated by the total enthalpy calculation processing unit 31 and the total heat load calculated by the total heat load calculation processing unit 32, the cooling operation mode and the reheat operation. An operation switching command for switching the dehumidification mode is generated. Finally, the operation mode switching processing unit 35 switches between the cooling operation mode and the reheat dehumidification mode based on the operation switching command generated by the optimum operation mode switching time calculation processing unit 34.

  The control flow shown in FIG. 5 is realized by executing the program for the cooling operation mode switching process. The program for the cooling operation mode switching process is stored in the storage unit 14 of the air conditioner 1. When the remote controller 15 inputs to the air conditioning apparatus 1 the temperature and humidity preferred by the user or the temperature desired by the user and the desired time of the user until reaching the humidity, the control unit 13 causes the storage unit 14 to perform the operation. The program for the cooling operation mode switching process is read and executed.

  The user's desired temperature and humidity input from the remote controller 15 to the air conditioning apparatus 1 or the user's desired temperature and the desired time until reaching the humidity are respectively the user's preferred temperature K_user [°C]. And humidity M_user[%], temperature K_user[° C.] preferred by the user, and desired time Time_user[s] to reach the humidity M_user[%] are stored in the storage unit 14.

  The cooling operation mode switching process will be described in detail with reference to FIGS. 6 to 12. As shown in FIG. 6, when the cooling operation mode switching process is started, the control unit 13 first executes a total enthalpy calculation process (step S101). The total enthalpy calculation process will be described with reference to the flowchart shown in FIG. 7.

In the total enthalpy calculation process, first, the pressure loss of the air blowing passage is obtained based on the pressure loss of the wind direction control plate 5 and the pressure loss of the heat exchanger 3. Using the obtained pressure loss in the air flow passage, the air flow rate V [m ³ /min] of the air blown out from the air outlet of the air conditioner 1 is calculated. The sensible heat load and the latent heat load are calculated using the calculated air flow rate V [m ³ /min].

  The control unit 13 collects the relationship between the cooling operation time, the latent heat load of the heat exchanger 3, and the amount of condensed water adhering to the fins 20 in the heat exchanger pressure loss database in advance. The heat exchanger pressure loss database is stored in the storage unit 14.

  In addition, the control unit 13 uses the test data at the time of development to create a wind direction control plate pressure loss database in the relationship among the rotation speed of the fan 4, the angle of the wind direction control plate 5, and the pressure loss in the wind direction control plate 5. , Create in advance. The control unit 13 records the pressure loss in the wind direction control plate 5 in the operating state at any time in the created wind direction control plate pressure loss database. The wind direction control plate pressure loss database is stored in the storage unit 14.

  The control unit 13 collects the relationship between the pressure loss of the heat exchanger 3 and the pressure loss of the wind direction control plate 5 in advance in the blower duct pressure loss database. The blower duct pressure loss database is stored in the storage unit 14.

  As shown in FIG. 7, the control unit 13 calculates the amount of change in the humidity of the air from the windward to the leeward of the heat exchanger 3 from the humidity detected by the windward humidity sensor 7 and the leeward humidity sensor 9. The control unit 13 calculates the latent heat load from the calculated humidity change amount.

The control unit 13 calculates the pressure loss of the heat exchanger 3 according to the calculated latent heat load from the heat exchanger pressure loss database stored in the storage unit 14, and calculates the pressure loss R _{heat exchanger} of the heat exchanger 3 [( Pa)/(m ³ /min)] (step S201).

Next, the pressure loss of the wind direction control plate 5 is calculated. The control unit 13 acquires the rotation speed of the fan 4 from the fan rotation sensor 10 and acquires the angle of the wind direction control plate 5 from the angle detection sensor 12. The control unit 13 acquires the pressure loss of the wind direction control plate 5 according to the rotation speed of the fan 4 and the angle of the wind direction control plate 5 from the wind direction control plate pressure loss database stored in the storage unit 14. The acquired pressure loss of the wind direction control plate 5 is digitized as a pressure loss R of the _wind direction control plate 5 [(Pa)/(m ³ /min)] (step S202).

The control unit 13 reads the blower duct pressure loss database stored in the storage unit 14, and acquires the pressure loss of the blower duct according to the pressure loss of the heat exchanger 3 and the pressure loss of the wind direction control plate 5. .. The acquired pressure loss in the air flow passage is _{quantified as} a pressure loss in the air flow passage R air flow passage [(Pa)/(m ³ /min)] (step S203).

Next, the air flow rate V [m ³ /min] is obtained. The static pressure characteristic, which is the relationship between the static pressure ΔP [Pa] of the wind generated by the fan 4 and the air flow rate V [m ³ /min], is shown in equation (1). a, b, c, d are constants.

ΔP=aV ³ +bV ² +cV+d (1)

Further, by using the pressure loss R _Sofufuro of blast air duct ^{[(Pa) / (m 3} / min)], and static pressure [Delta] P [Pa], the relationship between the air volume ^V [m 3 / min], the formula ( 2).

ΔP=R _{blast air passage} ·V (2)

The simultaneous equations of the above equations (1) and (2) are solved to obtain the air flow rate V [m ³ /min] (step S204).

  The control unit 13 causes the windward temperature sensor 6 to detect the windward temperature K1 [° C.] of the heat exchanger 3. The control unit 13 causes the windward humidity sensor 7 to detect the windward humidity M1 [%] of the heat exchanger 3. The control unit 13 causes the leeward temperature sensor 8 to detect the leeward temperature K2 [° C.] of the heat exchanger 3. The controller 13 causes the leeward humidity sensor 9 to detect the leeward humidity M2 [%] of the heat exchanger 3 (step S205).

  The air changes from (temperature K1, humidity M1) to (temperature K2, humidity M2) from the windward side to the leeward side of the heat exchanger 3. Here, the enthalpy [J/kg] when the air per unit mass changes from (temperature K1, humidity M1) to (temperature K2, humidity M2) is calculated using the air diagram shown in FIG.

  In FIG. 8, the air changes from (temperature K1, humidity M1) to (temperature K2, humidity M2) via the dew point. At that time, the specific enthalpy is H. From this specific enthalpy H, the enthalpy [J/kg] is calculated (step S206).

The enthalpy per unit time is calculated by multiplying the enthalpy [J/kg] calculated in step S206 by the air flow rate V [m ³ /min] calculated in step S204 and the air density ρ [kg] (step S207). The total enthalpy is calculated by multiplying the enthalpy per unit time by the time from the start of the cooling operation of the air conditioner 1 to the present time (step S208).

  Next, the control unit 13 executes the total heat load calculation process of the cooling operation mode switching process (step S102). The total heat load calculation processing operation will be described with reference to the flowchart shown in FIG.

As shown in FIG. 10, the thermal image sensor 11 captures a thermal image of the air-conditioned space 40 (step S301). The control unit 13 acquires a thermal image from the thermal image sensor 11. The control unit 13 detects an edge 41 that is a boundary between the floor surface and the wall surface from the thermal image. The control unit 13 obtains the dimensions of the floor surface and the wall surface from the detected length of the edge 41. The volume Vroom [m ³ ] of the air-conditioned space is calculated from the obtained dimensions of the floor surface and the wall surface. (Step S302).

  The controller 13 acquires the current windward temperature K1 [° C.] and humidity M1 [%] of the heat exchanger 3 from the windward temperature sensor 6 and the windward humidity sensor 7 (step S303). The current windward temperature K1 [° C.] and humidity M1 [%] of the heat exchanger 3 are the air immediately before being sucked into the heat exchanger 3, and therefore can be regarded as the current indoor temperature and humidity. it can.

  The control unit 13 inputs the temperature K_user[° C.] and the humidity M_user[%] that the user likes from the storage unit 14 to the air conditioning apparatus 1 from the remote controller 15, the temperature K_user[° C.] and the humidity M_user[ that the user likes. %] to obtain the desired time Time_user[s] (step S304).

  The control unit 13 calculates the enthalpy required to change from the current temperature (temperature K1, humidity M1) to the user's preference (temperature K_user, humidity M_user) using the psychrometric chart shown in FIG. 11. .. In FIG. 11, the air changes from (temperature K1, humidity M1) to (temperature K_user, humidity M_user) via the dew point. The specific enthalpy at that time is H2. The control unit 13 calculates the enthalpy [J/kg] from this specific enthalpy H2 (step S305).

The control unit 13 multiplies the calculated enthalpy by the volume Vroom [m ³ ] of the air-conditioned space calculated in step S302 and the air density ρ [kg] to obtain the heat required to reach the temperature and humidity the user likes. The total heat load, which is the total load, is calculated (step S306).

  The control unit 13 executes the optimum operation mode switching time calculation process of the cooling operation mode switching process (step S103). The operation of the optimum operation mode switching time calculation process will be described with reference to the flowchart shown in FIG.

  From the total enthalpy amount calculated by the total enthalpy calculation process in step S101 described above, the tendency of the change in enthalpy from the start of the cooling operation of the air conditioner 1 to the present is obtained. Based on the obtained tendency of change in enthalpy, when the current operation mode is continued, the total enthalpy processing amount, which is the total amount of enthalpy that can be processed from the present to the user's desired time, is calculated (step S401). When the calculated total amount of enthalpy processing is lower than the total heat load until the user's desired time (step S402; YES), it is not possible to obtain the temperature and humidity preferred by the user by the user's desired time. Therefore, "operate in the cooling operation mode" is generated as the operation switching command (step S403). By operating the air conditioner 1 in the cooling operation mode, the cooling operation such as lowering the temperature of the heat exchanger 3 and increasing the air volume of the fan 4 is performed, so that the temperature and the humidity which the user likes by the desired time of the user. Will be obtained.

  When the calculated total amount of enthalpy processing exceeds the total heat load until the user's desired time (step S402; NO), the temperature and humidity that the user likes before the user's desired time are obtained. Therefore, "run in reheat dehumidification mode" is generated as the operation switching command (step S404). Since the air conditioning apparatus 1 is operated in the reheat dehumidification mode, it is possible to prevent the temperature and humidity of the room from decreasing, so that the temperature and humidity that the user likes can be obtained in accordance with the time desired by the user. Can be

  The control unit 13 executes the operation mode switching process of the cooling operation mode switching process (step S104). The operation of the operation mode switching process will be described with reference to the flowchart shown in FIG.

  The control unit 13 acquires the operation command generated in the optimum operation mode switching time calculation process of step S103 described above (step S501). If the acquired operation command is "operate in cooling operation mode" (step S502; YES), the controller 13 operates the air conditioner 1 in cooling operation mode (step S503). If the acquired operation command is not "operate in the cooling operation mode" (step S502; NO), the controller 13 operates the air conditioner 1 in the reheat dehumidification mode (step S504).

  As described above, in the first embodiment, the windward temperature sensor 6 and the windward humidity sensor 7 detect the windward temperature and humidity of the heat exchanger 3, and the leeward temperature sensor 8 and the leeward humidity sensor 9. The total amount of enthalpy that can be processed from the present time to the user's desired time, which is obtained based on the leeward temperature and humidity of the heat exchanger 3, and the time required to reach the user's favorite temperature and humidity from the current temperature and humidity. By comparing the total heat load with the user, the cooling operation mode and the reheat dehumidification mode are automatically adjusted to reach the user's preferred temperature and humidity from the current temperature and humidity according to the user's desired time. Can be switched.

(Modification 1)
In the first embodiment, the size of the room is calculated from the thermal image of the room in the air-conditioned space 40 captured by the thermal image sensor 11, but an image sensor may be used instead of the thermal image sensor 11. In this case, an image sensor is used instead of the thermal image sensor 11 in steps S301 to S302 of the total heat load calculation process shown in FIG.

(Modification 2)
Although the leeward temperature sensor 8 and the leeward humidity sensor 9 are arranged leeward of the heat exchanger 3_2 in the first embodiment, they may be arranged on the wind direction control plate 5. The air blown out from the air outlet of the air conditioner 1 directly hits the wind direction control plate 5. Therefore, the leeward temperature sensor 8 and the leeward humidity sensor 9 can detect the temperature and humidity of the air immediately before being blown into the air-conditioned space 40, and the calculation accuracy of the total enthalpy calculation process can be improved.

Embodiment 2.
The control unit 13 can identify a humidity generation source such as clothes being washed and a pot being cooked by pattern recognition from the image captured by the thermal image sensor 11 or the image sensor. The control unit 13 prepares supervised learning data about humidity sources such as clothes and a cooking pot, and learns the data using machine learning such as a support vector machine and a neural network so that pattern recognition can be performed. Become. The result learned by the control unit 13 is stored in the storage unit 14. The control unit 13 reads the learned result from the storage unit 14 and performs pattern recognition.

  FIG. 14 shows a database of humidity generation amounts from the humidity generation source. This database can be used to calculate the amount of humidity generation from the humidity generation source. From the calculated amount of generated humidity, the amount of change in indoor humidity per unit time can be estimated.

  In step S305 of the total heat load calculation process, the control unit 13 uses the amount of change in indoor humidity per unit time to calculate the amount of change in temperature from the present time to the user's desired time. The control unit 13 obtains the enthalpy based on the calculated amount of change in humidity. The control unit 13 adds the obtained enthalpy to the enthalpy necessary for changing from the current temperature (temperature K1, humidity M1) to the user's preference (temperature K_user, humidity M_user). Thereby, the accuracy of the total heat load calculated in the total heat load calculation process can be improved.

Embodiment 3.
The control unit 13 can identify the door or window of the air-conditioned space 40 by performing pattern recognition from the images captured by the thermal image sensor 11 and the image sensor. A user obtains outdoor weather information from the Internet, newspapers, televisions, and the like, and manually inputs it to the air conditioning apparatus 1. Thereby, the air conditioning apparatus 1 can obtain the temperature and humidity of the outside air.

  The control unit 13 counts the size of windows and doors and the floor, and the number of times the windows and doors are opened and closed. The control unit 13 implements a ventilation volume calculation process for calculating a ventilation volume. The ventilation amount calculation process reflects the temperature and humidity of the outside air, and the air-conditioning space 40 is ventilated by opening and closing the windows and doors. The output can be estimated.

In step S305 of the total heat load calculation process, the control unit 13 uses the inflow/outflow amount of temperature and humidity per unit time estimated in the ventilation volume calculation process to calculate the temperature and humidity from the present time to the user's desired time. Calculate inflow and outflow. The control unit 13 obtains the enthalpy based on the calculated inflow and outflow amounts of temperature and humidity. The control unit 13 adds the obtained enthalpy to the enthalpy required to change from the current temperature (temperature K1, humidity M1) to the user's preference (temperature K_user, humidity M_user).
Thereby, the accuracy of the total heat load calculated by the total heat load calculation process can be improved.

  In each of the above-described embodiments, the program for the cooling operation mode switching process is a CD-ROM (Compact Disc Read Only Memory), a DVD (Digital Versatile Disc), a magneto-optical disc (Magneto-Optical Disc), or a USB (Universal Universal Disc). It is also possible to store in a computer-readable recording medium such as a memory, a memory card, and an HDD (Hard disk drive) for distribution. By installing the thus-distributed program for the cooling operation mode switching process in a specific or general-purpose computer, the computer can be made to function as the control unit 13 in each of the above-described embodiments.

  Further, the program for the cooling operation mode switching process is stored in various computer-readable recording media included in a server on a network such as the Internet, and the program for the cooling operation mode switching process is downloaded from the server to the computer. Good.

  The present invention allows various embodiments and modifications without departing from the broad spirit and scope of the present invention. Further, the above-described embodiments are for explaining the present invention and do not limit the scope of the present invention. That is, the scope of the present invention is shown not by the embodiments but by the claims. Various modifications made within the scope of the claims and within the scope of the meaning of the invention equivalent thereto are regarded as within the scope of the present invention.

  INDUSTRIAL APPLICATION This invention can be utilized suitably for an air conditioning apparatus, a control method, and a program.

1 air conditioner, 2 filter, 3 heat exchanger, 4 fan, 5 wind direction control plate, 6 windward temperature sensor, 7 windward humidity sensor, 8 windward temperature sensor, 9 windward humidity sensor, 10 fan rotation sensor, 11 heat Image sensor, 12 angle detection sensor, 13 control unit, 14 storage unit, 15 remote controller, 20 fins, 21 piping, 22 water film, 31 total enthalpy calculation processing unit, 32 total heat load calculation processing unit, 34 optimum operation mode switching time Calculation processing unit, 35 Operation mode switching processing unit, 40 Air-conditioned space, 41 Edge.

Claims (8)

A heat exchanger,
An windward temperature sensor and a windward humidity sensor arranged on the windward side of the heat exchanger,
An leeward temperature sensor and a leeward humidity sensor arranged on the leeward side of the heat exchanger,
A first enthalpy when air changes from the temperature and humidity on the upwind side detected by the upwind temperature sensor and the humidity sensor on the upwind side to the temperature and humidity on the downwind side detected by the downwind temperature sensor and the downwind humidity sensor. The second enthalpy at the time when the air changes to the temperature and humidity set by the user from the total enthalpy obtained by using the temperature and humidity on the windward side detected by the windward temperature sensor and the windward humidity sensor. Based on the total heat load obtained as a result, a control unit that controls the operation mode so that the air in the air-conditioned space changes to the temperature and humidity set by the user at the desired time set by the user. Harmony device.   The control unit obtains the enthalpy per unit time from the air flow rate, the air density, and the first enthalpy, and from the enthalpy per unit time, the total amount of enthalpy from the start of operation of the air conditioner to the present time. The air conditioner according to claim 1, wherein a certain total amount of enthalpy is obtained. The air conditioner further includes an imaging unit that images the inside of the air-conditioned space,
The said control part calculates the volume of an air-conditioned space from the image in the air-conditioned space imaged by the said imaging means, and calculates|requires the said heat load total amount from the said volume, air density, and the said 2nd enthalpy. Air conditioner.   The control unit identifies the humidity source in the air-conditioned space by pattern recognition from the image captured by the image capturing unit, and determines the humidity variation amount based on the humidity variation amount determined based on the identified humidity source. The air conditioner according to claim 3, wherein the enthalpy of the humidity is calculated, and the calculated enthalpy of the amount of change in humidity is added to the total heat load. The operation mode is a cooling operation mode and a reheat dehumidification operation mode,
The control unit obtains a tendency of change in enthalpy from the total enthalpy amount, calculates the total enthalpy processing amount that can be processed by the user's desired time when the current operation mode is continued based on the tendency, and the total enthalpy processing amount. Is controlled to switch the operation mode to the cooling operation mode when the total heat load is less than the total heat load, and when the total enthalpy treatment amount exceeds the total heat load, the operation mode is changed to the reheat dehumidification operation mode. The air conditioner according to any one of claims 1 to 4, which is controlled so as to be switched.   The control unit acquires the temperature and humidity of the outside air from the information of the weather obtained from the outside, estimates the inflow and outflow of the temperature and humidity from the outdoor to flow in and out by ventilation, of the estimated temperature and humidity The air conditioner according to any one of claims 1 to 5, wherein the enthalpy of the inflow and outflow is obtained from the inflow and outflow, and the obtained enthalpy of the inflow and outflow is added to the total heat load. An air conditioner comprising a heat exchanger, a windward temperature sensor and a windward humidity sensor arranged on the windward side of the heat exchanger, and a leeward temperature sensor and a leeward humidity sensor arranged on the leeward side of the heat exchanger. A control method for controlling,
A first enthalpy when air changes from the temperature and humidity on the upwind side detected by the upwind temperature sensor and the humidity sensor on the upwind side to the temperature and humidity on the downwind side detected by the downwind temperature sensor and the downwind humidity sensor. To find the total enthalpy,
From the windward temperature and humidity detected by the windward temperature sensor and the windward humidity sensor, obtain the total heat load using the second enthalpy when the air changes to the temperature and humidity set by the user,
A control method for controlling an operation mode based on the total amount of enthalpy and the total amount of heat load so that the air in the air-conditioned space changes to the temperature and humidity set by the user at a desired time set by the user. A program for causing a computer to function as a means for controlling an air conditioner,
On the computer,
Enthalpy using the first enthalpy when the air changes from the temperature and humidity on the upwind side detected by the windward temperature sensor and the humidity sensor on the upwind side to the temperature and humidity on the downwind side detected by the downwind temperature sensor and the downwind humidity sensor. The process of obtaining the total amount,
A process for obtaining the total heat load using the second enthalpy when the air changes from the temperature and humidity on the windward side detected by the windward temperature sensor and the windward humidity sensor to the temperature and humidity set by the user,
Based on the total amount of enthalpy and the total amount of heat load, at a desired time set by the user, a process of controlling the operation mode so that the air in the air-conditioned space changes to the temperature and humidity set by the user,
A program to execute.

Images